This web accessibility (a11y) training site is a self-guided educational resource for University of Illinois Chicago developers. Here you’ll find: (1) an introductory exposition of a11y concepts and definitions, (2) detailed procedures showing you how to test for accessibility, and (3) hands-on exercises containing accessibility violations intentionally coded onto the page.
In addition to the exercises pages, a special bonus “issue” can be found on the hero image of this site’s home page (the big header image above). It’s easy to miss at a glance, but the issue in this image should stand out to developers experienced with web accessibility. If you can’t figure it out, a corrected hero image is available on all landing pages (e.g., the Topics page) of this site. Did you spot the error? What’s wrong in the hero image above, and why should it be corrected?